Today's 18.04 upgrade from 17.10, using 4k or 1080 monitor with display port or with HDMI for Radeon RX 460 booting until bios,then screen flashing with jumbled colors every few seconds, shutdown displays Ubuntu logo. Removing graphics card and using onboard HDMI for both is same as above, but shows Ubuntu loading animation, then no signal. Starting without monitor the plugging in 1080 shows attached picture between flashing
** Attachment added: "Screenshot_20180405-153332.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723619/+attachment/5103173/+files/Screenshot_20180405-153332.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1723619 Title: Ubuntu Desktop ISO fails to boot with nouveau on a displayport To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1723619/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
